The first-generation Mazda3 (internal code BK) succeeded the 323, marking a true stylistic and dynamic revolution for the Hiroshima-based manufacturer. Based on the excellent C1 platform (developed jointly with Ford and Volvo, and shared with the Focus II and S40), it offers first-class road handling, precise steering, and driving pleasure superior to the category average. While the gasoline engines (MZR family) are 100% Mazda-designed and boast exceptional reliability (chain timing), the model's overall record is heavily marred by an extreme susceptibility to corrosion, particularly on models produced before the 2006 facelift. The diesel engines, borrowed from PSA/Ford (1.6) or developed by Mazda (2.0), present a much darker reliability record. The mid-life facelift (2006) brought slight
The first-generation Mazda3 is a car with two faces. If you opt for a gasoline engine (1.6 or 2.0 MZR), you are buying one of the most reliable and enjoyable compact cars of its generation. However, diesel versions are to be avoided due to potentially ruinous maintenance costs. However, the purchase decision should not be based on the engine, but on the bodywork. Corrosion is an absolute scourge on the BK generation. A perfectly maintained gasoline model with rust on the rear fenders or underbody will not pass the technical inspection in the long run. Prioritize a post-2006 (facelifted) model, originally from the south of France (or regions without de-icing salt), and inspect it thoroughly.